Dremel 780 Assembly, Operation Instructions, Introduction, Nut, Rotary Tool is running

! WARNING

DM 2610913513 6/01 6/8/01 8:44 PM Page 8

Assembly

ALWAYS BE SURE THE TOOL IS

IN THE “0” POSITION BEFORE CHANGING ACCESSORIES, CHANGING COLLETS OR

COLLET IDENTIFICATION CHART — Collet sizes can be identified by the rings on the back end of collet.

SERVICING YOUR CORDLESS ROTARY TOOL.

SHAFT

LOCK

BUTTON

TO TIGHTEN

COLLET

NUT

TO LOOSEN	COLLET	COLLET
	WRENCH

1/32" Collet has one (1) ring. 1/16" Collet has two (2) rings. 3/32" Collet has three (3) rings. 1/8" Collet has no rings.

4801/8"

COLLET

COLLET

NUT

481 3/32" 482 1/16"

COLLET COLLET

IDENTIFICATION

RINGS

483 1/32"

COLLET

COLLET — To loosen, first press shaft lock button and rotate the shaft by hand until the lock engages the shaft preventing further rotation.

! CAUTION	Do not engage lock while the
	Rotary Tool is running.

With the shaft lock engaged use the collet wrench to loosen the collet nut if necessary. Change accessories by inserting the new one into the collet as far as possi- ble to minimize runout and unbalance. With the shaft lock engaged, finger tighten the collet nut until the accessory shank is gripped by the collet. Avoid exces- sive tightening of the collet nut.

COLLETS — Four different size collets (see illus- tration), to accommodate different shank sizes, are available for your Cordless Rotary Tool. To install a dif- ferent collet, remove the collet nut and remove the old collet. Insert the unslotted end of the collet in the hole

in the end of the tool shaft. Replace collet nut on the shaft. Always use the collet which matches the shank size of the accessory you plan to use. Never force a larger diameter shank into a collet.

BALANCING ACCESSORIES — For precision work, it is important that all accessories be in good balance (much the same as the tires on your automobile). To true up or balance an accessory, slightly loosen collet nut and give the accessory or collet a 1/4 turn. Re- tighten collet nut and run the Tool. You should be able to tell by the sound and feel if your accessory is run- ning in balance. Continue adjusting in this fashion until best balance is achieved. To maintain balance on abra- sive wheel points, before each use, with the wheel point secured in the collet, turn on the Cordless Rotary Tool and run the 415 Dressing Stone lightly against the revolving wheel point. This removes high spots and trues up the wheel point for good balance.

Operation Instructions

Introduction

The Cordless Rotary Tool is a handful of high-speed power. It serves as a carver, a grinder, polisher, sander, cutter, power brush, drill and more.

Your Cordless Rotary Tool has a small, powerful electric motor, is comfortable in the hand, and is made to accept a large variety of accessories including abrasive wheels, drill bits, wire brushes, polishers, engraving cutters, router bits, and cutting wheels. Accessories come in a variety of shapes and permit you to do a number of different jobs. As you become familiar with the range of

accessories and their uses, you will learn just how versatile your Cordless Rotary Tool is. You’ll see dozens of uses you hadn’t thought of before now.

The real secret of the Cordless Rotary Tool is its speed. To understand the advantages of its high speed, you have to know that the standard portable electric drill runs at speeds up to 2,800 revolutions per minute. The typical electric drill is a low-speed, high torque tool; the Cordless Rotary Tool is just the opposite — a high- speed, low torque tool. The chief difference to the user is that in the high speed tools, the speed combined with the accessory mounted in the collet does the work. You

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